纤维增强钛基复合材料界面断裂韧性的顶出法研究（英文）
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摘要
为了估计单向SiC纤维增强钛基复合材料的界面断裂韧性GIIc,提出了一个关于单根纤维顶出试验的新模型。在该模型中,界面脱粘开始于试样的底端面。以断裂力学为基础推导出了GIIc的理论公式,并且讨论了几个关键因素对GIIc的影响,如裂纹扩展所需的外加应力,裂纹长度以及界面的摩擦剪切应力。并且运用此模型预测了复合材料Sigma1240/Ti-6-4,SCS/Ti-6-4,SCS/Timetal 834和SCS/Timetal 21s的界面断裂韧性,并与以前的有限元结果进行了比较。结果显示,对于脱粘起始于试样的底端面的顶出试验,该模型能较可靠地预测钛基复合材料的界面断裂韧性。
The model for single fiber push-out test was developed to evaluate the fracture toughness GIIc of the fiber/matrix interface in titanium alloys reinforced by SiC monofilaments. Theoretical solution to GIIc was obtained from fracture mechanics, and the effects of several key factors such as the applied stress needed for crack advance, crack length, and interfacial frictional shear stress were discussed. The predictions by the model were compared with the previous finite element analysis results for the interfacial toughness of the composites including Sigma1240/Ti-6-4, SCS/Ti-6-4, SCS/Timetal 834 and SCS/Timetal 21 s. The results show that the model can reliably predict the interfacial toughness of the titanium matrix composites, in which interfacial debonding usually occurs at the bottom of the samples.
The model for single fiber push-out test was developed to evaluate the fracture toughness GIIc of the fiber/matrix interface in titanium alloys reinforced by SiC monofilaments. Theoretical solution to GIIc was obtained from fracture mechanics, and the effects of several key factors such as the applied stress needed for crack advance, crack length, and interfacial frictional shear stress were discussed. The predictions by the model were compared with the previous finite element analysis results for the interfacial toughness of the composites including Sigma1240/Ti-6-4, SCS/Ti-6-4, SCS/Timetal 834 and SCS/Timetal 21 s. The results show that the model can reliably predict the interfacial toughness of the titanium matrix composites, in which interfacial debonding usually occurs at the bottom of the samples.
引文
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28 Roman I,Jero P D.MRS Proceedings[J],1992,273:337
29 Mukherjee S,Ananth C R,Chandra N.Composites Science and Technology[J],1997,57:1501
30 Chandra N.Composites:Part A[J],2002,33:1433
2 Yuan Meini,Yang Yanqing,Huang Bin et al.Transactions of Materials and Heat Treatment[J],2012,33(6):176(in Chinese)
3 Yuan Meini,Yang Yanqing.Rare Metal Materials and Engineering[J],2008,37(12):2104
4 Yang Y Q,Dudek H J,Kumpfert J.Materials Science and Engineering A[J],1998,246:213
5 Yuan Meini,Yang Yanqing,Huang Bin et al.Rare Metal Materials and Engineering[J],2009,38(8):1321
6 Mukherjee S,Ananth C R,Chandra N.Scripta Materialia[J],1997,36(11):1333
7 Zeng Weidong,Zhou Yigang,Peters P W M.Rare Metal Materials and Engineering[J],2002,31(6):445(in Chinese)
8 Ananth C R,Chandra N.Journal of Composite Materials[J],1995,29:1488
9 Chandra N,Ghonem H.Composites:Part A[J],2001,32:575
10 Yuan Meini,Yang Yanqing,Ma Zhijun et al.Rare Metal Materials and Engineering[J],2007,36(6):1115(in Chinese)
11 Honda K,Kagawa Y.Acta Materialia[J],1996,44:3267
12 Galbraith J M,Rhyne E P.Koss D A et al.Scripta Materialia[J],1996,35:543
13 Rhyne E P,Hellmann J R,Galbraith J M et al.Scripta Metallurgical Materialia[J],1995,32:547
14 Chandra N,Ananth C R.Composites Science and Technology[J],1995,54:87
15 Yuan M N,Yang Y Q,Ma Z J.Scripta Materialia[J],2007,56:533
16 Yuan Meini,Yang Yanqing,Huang Bin et al.Transactions of Nonferrous Metals Society of China[J],2008,18:925
17 Mukherjee S,Ananth C R,Chandra N.Composites:Part A[J],1998,29:1213
18 Ananth C R,Voleti S R,Chandra N.Composites:Part A[J],1998,29:1203
19 Zhou L M,Mai Y W,Ye L.Composites Engineering[J],1995,5(10-11):1199
20 Majumdar B S,Miracle D B.Key Engineering.Materials[J],1996,116/117:153
21 Kalton A F,Howard S J,Janczak-Rusch J et al.Acta Materialia[J],1998,46:3175
22 Jero P D,Kearns R J.Scripta Metallurgical[J],1990,24:2315
23 Warren P D,Mackin T J,Evans A G.Acta Metallurgical Materials[J],1992,40:1243
24 Liang C,Hutchinson J W.Mechanics of Materials[J],1993,14:207
25 Zeng W D,Peters P W M,Tanaka Y.Composites:Part A[J],2002,33:1159
26 Zheng D,Ghonem H.Metallurgical and Materials Transactions A[J],1995,26:2469
27 Nyakana S L,Fanning J C,Boyer R B.Journal of Materials Engineering and Performance[J],2005,14:799
28 Roman I,Jero P D.MRS Proceedings[J],1992,273:337
29 Mukherjee S,Ananth C R,Chandra N.Composites Science and Technology[J],1997,57:1501
30 Chandra N.Composites:Part A[J],2002,33:1433